fix: only send edits when they are actual changes

Author: folke

lua/null-ls/formatting.lua

@@ -58,7 +58,16 @@ M.handler = function(method, original_params, handler)
         local diffed_edits = {}
         for _, edit in ipairs(edits) do
             local diffed = lsp.util.compute_diff(params.content, vim.split(edit.text, "\n"))
-            table.insert(diffed_edits, { newText = diffed.text, range = diffed.range })
+            -- check if the computed diff is an actual edit
+            if
+                not (
+                    diffed.text == ""
+                    and diffed.range.start.character == diffed.range["end"].character
+                    and diffed.range.start.line == diffed.range["end"].line
+                )
+            then
+                table.insert(diffed_edits, { newText = diffed.text, range = diffed.range })
+            end
         end
 
         local marks, views = save_win_data(bufnr)